This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Modeling the Integration of Complex EV Systems into NVH Treatments Using Sound Phonons
Technical Paper
2023-01-1051
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Current and future EV’s contain significant amounts of complex electrical hardware, including rechargeable energy modules, control units, cooling systems and wiring situated inside the cabin usually below the carpet, seats or trunk trim and below the cabin floor. These items, whilst likely to have a direct impact on transmission loss, are increasingly difficult to evaluate via typical methods of computer-based simulation. In particular, the packaging space allocated for control units, which may require an air gap between the body in white and the carpet for aspects of heat stabilization can be difficult to model using the transfer matrix method.
In the case of battery installations their high bulk mass doesn’t necessarily provide significant increases in transmission loss due to adjacent acoustic weaknesses and the inherent sensitivity of the floor system. This paper examines a selection of novel techniques, using sound Phonons, developed to predict both baseline transmission loss and absorption and subsequently acoustic performance optimization. The user-friendly nature of the sound Phonon application enabled “full vehicle” models to be efficiently created for interior and exterior noise prediction. This is particularly useful for EV target compliance evaluation when a platform is undergoing conversion from ICE to EV or assisting a “clean sheet” EV design.
Citation
Morris-Kirby, R. and Tinti, F., "Modeling the Integration of Complex EV Systems into NVH Treatments Using Sound Phonons," SAE Technical Paper 2023-01-1051, 2023, https://doi.org/10.4271/2023-01-1051.Also In
References
- Picaut , J. , and Fortin , N. SPPS, a Particle-Tracing Numerical Code for Indoor and Outdoor Sound Propagation Prediction Acoustics 2012 Nantes, France 2012
- blender.org/about/
- Gomperts , M.C. and Kihlman , T. The Sound Transmission Loss of Circular and Slip-Shaped Apertures in Wall Acta Acustica united with Acustica 18 1967 144 150
- Morris-Kirby , R. and Harry , E.J. Use of Sound “Phonons” in the Modelling and Optimization of Automotive Acoustic Systems in 3D Internoise 2022
- Perdeira , I. , Guettler , M. , and Merz , S.